Wilson, M. A. (1967). Energy. Time-Life Books.
Lua i Stíl Chicago (17ú heag.)Wilson, Mitchell A. Energy. New York: Time-Life Books, 1967.
Lua MLA (8ú heag.)Wilson, Mitchell A. Energy. Time-Life Books, 1967.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.